MAL-2026-13630

    Dashboard / Malicious Package / MAL-2026-13630

    MAL-2026-13630

    Published: 8 Aug 2026Last Modified: 10 Aug 2026

    Summary: Malicious code in @rbx-ts/services (npm)

    Details: Source: amazon-inspector (9476bbe7c2ce12348142e93deffe53c9d4d6dfef3400030af81cff902bac5935) This package impersonates the @rbxts/services Roblox typings library and re-exports its public API in index.js as cover. Its postinstall script (scripts/postinstall.js) is gated to win32 and uses \x hex escapes to hide the strings 'child_process', 'spawn', 'powershell', and related identifiers. It spawns a hidden PowerShell process with -ExecutionPolicy Bypass, passing a base64-encoded body that decodes to an AMSI bypass (patched via reflection with strings split across variables to evade signature scanning), downloads a binary from https://files.catbox.moe/a3loxy.bin, allocates RWX memory via VirtualAlloc with protection 0x40, copies the downloaded bytes into it, and executes them via CreateThread. Installing this package on Windows results in arbitrary attacker shellcode executing in the installer's process on `npm install`.

    References: https://www.npmjs.com/package/@rbx-ts/services/v/1.6.0, https://www.npmjs.com/package/@rbx-ts/services/v/1.6.2, https://www.npmjs.com/package/@rbx-ts/services/v/1.6.1

    Affected packages

    Package

    Name: @rbx-ts/services

    Purl: pkg:npm/%40rbx-ts/services

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.6.0
    1.6.2
    1.6.1
    MAL-2026-13630 | CVE-DB